Ananke later revealed that the gambit will not work for mortals, but death gods are able to extend their lives by killing another god. This information resulted in Baphomet attacking Urdr, and then later, Inanna. However it is possible that Ananke lied, in order to trick Baphomet into incriminating himself.
In Greek mythology, Prometheus is a Titan who moulded human beings out of clay. He also famously gave them the gift of fire, stolen from Mount Olympus. In this case, the killing of a god would be analogous to 'stealing their fire'. Mary Shelley (aka Woden) referenced the Prometheus myth in her novel Frankenstein, subtitling it "The Modern Prometheus".